Outputs (39)

Repeatability and reproducibility of the measurement of prepreg tack following ASTM D8336: Results of a round-robin study (2024)
Journal Article
Joesbury, A. M., Endruweit, A., Budelmann, D., Giannis, S. P., De Focatiis, D. S., Call, D. B., Chan, C., Choong, G. Y., Clark, R. A., Collins, J. A., Fishpool, D. T., Garber, J. M., Ghose, S., Golding, J., Good, S. T., Jones, B. R., Meiners, D., Niitsoo, O., Palmer, C. T., Qian, C. C., …Yuan, H. (2025). Repeatability and reproducibility of the measurement of prepreg tack following ASTM D8336: Results of a round-robin study. Composites Part A: Applied Science and Manufacturing, 188, Article 108561. https://doi.org/10.1016/j.compositesa.2024.108561

This study reports the findings from a round robin test exercise investigating ASTM D8336, a method for the measurement of tack of prepregs applicable to automated material placement technologies. Twelve participants tested two prepreg materials in a... Read More about Repeatability and reproducibility of the measurement of prepreg tack following ASTM D8336: Results of a round-robin study.

Effects of oil palm trunk biochar as filler on physical and mechanical properties of deproteinised and epoxidised natural rubber latex foam (2024)
Journal Article
Ramli, R., Chai, A. B., Kamaruddin, S., Ho, J. H., Mohd. Rasdi, F. R., De Focatiis, D. S. A., Ong, S. K., & Bachmann, R. T. (2024). Effects of oil palm trunk biochar as filler on physical and mechanical properties of deproteinised and epoxidised natural rubber latex foam. Journal of Rubber Research, 27, 623-637. https://doi.org/10.1007/s42464-024-00283-1

Oil palm trunk biochar (OPTB) serves as a flame-retardant additive aimed at enhancing the thermal stability of natural rubber (NR) latex foam. This study explores whether OPTB affects the physical and mechanical properties of specialty NR (SpNR) late... Read More about Effects of oil palm trunk biochar as filler on physical and mechanical properties of deproteinised and epoxidised natural rubber latex foam.

Dynamic behavior of polymers (2024)
Book Chapter
Siviour, C. R., & De Focatiis, D. S. (2024). Dynamic behavior of polymers. In Dynamic Behavior of Materials: Fundamentals, Material Models, and Microstructure Effects (553-595). Elsevier. https://doi.org/10.1016/b978-0-323-99153-7.00013-x

Measuring, understanding, and modeling the high strain rate properties of polymers are of importance in a wide range of applications. These properties also give unique insight into the processes governing polymer deformation. Compared to metals, howe... Read More about Dynamic behavior of polymers.

Compressive Stress-Strain and Rebound Resilience Properties of Deproteinized Natural Rubber Latex Foam (2023)
Journal Article
Ramli, R., Chai, A. B., Kamaruddin, S., Ho, J. H., & De Focatiis, D. S. (2023). Compressive Stress-Strain and Rebound Resilience Properties of Deproteinized Natural Rubber Latex Foam. Key Engineering Materials, 962, 39-44. https://doi.org/10.4028/p-a5zmst

Deproteinized natural rubber (DPNR) latex is a modified version of natural rubber (NR) latex that is hypoallergenic and odorless when used in products. However, due to the lack of studies in this field, there are relatively few DPNR latex foam produc... Read More about Compressive Stress-Strain and Rebound Resilience Properties of Deproteinized Natural Rubber Latex Foam.

Development of Deproteinized Natural Rubber Latex Foam for Seat Cushions (2023)
Journal Article
Ramli, R., Chai, A. B., Kamaruddin, S., Ho, J. H., & De Focatiis, D. S. (2023). Development of Deproteinized Natural Rubber Latex Foam for Seat Cushions. Key Engineering Materials, 962, 29-37. https://doi.org/10.4028/p-hwlt4p

In the transportation industry, seat cushions are crucial since they are directly responsible for the comfort and safety of the occupant. In this study, recently developed deproteinized natural rubber (DPNR) latex foam is used to make seat cushions f... Read More about Development of Deproteinized Natural Rubber Latex Foam for Seat Cushions.

Effects of oil palm trunk biochar on the thermal stability and acoustic properties of specialty natural rubber latex foam (2023)
Journal Article
Ramli, R., Chai, A. B., Kamaruddin, S., Ho, J. H., Mohd. Rasdi, F. R., De Focatiis, D. S. A., Ong, S. K., & Bachmann, R. T. (2023). Effects of oil palm trunk biochar on the thermal stability and acoustic properties of specialty natural rubber latex foam. Journal of Rubber Research, 26(1), 1-15. https://doi.org/10.1007/s42464-023-00193-8

Specialty natural rubber (SpNR) latex foam is a natural-based acoustic foam material, that can substitute conventional synthetic foams to control noise pollution in buildings and in the transportation industry. However, the thermal stability of SpNR... Read More about Effects of oil palm trunk biochar on the thermal stability and acoustic properties of specialty natural rubber latex foam.

Anisotropic swelling of rubber: extension of the Flory theory (2022)
Journal Article
Fernandes, V. A., & De Focatiis, D. S. A. (2022). Anisotropic swelling of rubber: extension of the Flory theory. Journal of Rubber Research, https://doi.org/10.1007/s42464-022-00183-2

The anisotropy of the swelling of rubber is examined both theoretically and experimentally. The Flory theory is extended to account for anisotropic swelling, allowing the determination of the average molecular weight between cross-links for rubber wi... Read More about Anisotropic swelling of rubber: extension of the Flory theory.

The acoustic properties of latex foam made from deproteinized natural rubber latex and epoxidized natural rubber latex (2022)
Journal Article
Ramli, R., Chai, A. B., Kamaruddin, S., Ho, J. H., Rasdi, F. R. M., & De Focatiis, D. S. A. (2022). The acoustic properties of latex foam made from deproteinized natural rubber latex and epoxidized natural rubber latex. Journal of Rubber Research, 25(4), 321-336. https://doi.org/10.1007/s42464-022-00178-z

Acoustic foam materials are used to control noise pollution in a wide range of applications, including buildings and the transportation industry. This study explores the feasibility of replacing conventional acoustic foam made of synthetic material w... Read More about The acoustic properties of latex foam made from deproteinized natural rubber latex and epoxidized natural rubber latex.

Sustainable ABA triblock methacrylate copolymers incorporating both high and low Tg terpene-derived monomers (2022)
Journal Article
Atkinson, R. L., Elsmore, M., Smith, S., Reynolds-Green, M., Topham, P. D., Toolan, D. T., Derry, M. J., Monaghan, O., Taresco, V., Irvine, D. J., Stockman, R. A., De Focatiis, D. S., & Howdle, S. M. (2022). Sustainable ABA triblock methacrylate copolymers incorporating both high and low Tg terpene-derived monomers. European Polymer Journal, 179, Article 11567. https://doi.org/10.1016/j.eurpolymj.2022.111567

We report the synthesis of novel terpene-based monomers: nopinyl acrylate and methacrylate, from naturally abundant β-pinene. A very high Tg value was observed for poly(nopinyl methacrylate) when synthesised by free radical polymerisation, and well-d... Read More about Sustainable ABA triblock methacrylate copolymers incorporating both high and low Tg terpene-derived monomers.

Biomimetic folding of triangular deployable membranes (2022)
Journal Article
Tang, Y., Beccarelli, P., Guo, H., Liu, R., De Focatiis, D., & Deng, Z. (2022). Biomimetic folding of triangular deployable membranes. Bioinspiration and Biomimetics, 17(6), Article 066002. https://doi.org/10.1088/1748-3190/ac7fd3

Deployable membranes are being increasingly applied in numerous space projects owing to their light weight, small stowage volume and capacity for use at large scales. The geometric design of biomimetic folding is studied to design crease patterns for... Read More about Biomimetic folding of triangular deployable membranes.